Spa Essentials Calcium Hardness Increaser is an easy to use granular product that raises the calcium hardness level in spa and hot tub water. Proper calcium hardness level helps prevent corrosion of equipment and etching of spa surfaces. Use Calcium Hardness Increaser to raise calcium hardness to the proper level.
- Increases calcium hardness level in spa water
- Helps prevent corrosion of spa equipment and surfaces
- Easy to use granules
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